package com.itheima.controller;


import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Validated
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$")String password){

            //        查询用户
            User u = userService.findByUserName(username);
            if(u==null){
//            没有占用
//            注册
                userService.register(username,password);
                return Result.success();
            }else{
//            占用
                return Result.error("用户名已被占用");
            }
    }
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$")String password){
//        根据用户名查询用户
        User loginUser = userService.findByUserName(username);
//        判断密码是否正确
        if(loginUser==null){
            return Result.error("用户名错误");
        }
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword()))
        {
//            登录成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
//            把token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    public Result<User> userInfo(/*@RequestHeader(name = "Authorization") String token*/)
    {
//        Map<String,Object> map = JwtUtil.parseToken(token);
//        String username = (String)map.get("username");
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String)map.get("username");
        User user = userService.findByUserName(username);

        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user)
    {
        userService.update(user);
        return Result.success();
    }
//    更新头像
    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl)
    {
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization")String token){
//        1、校验参数
        String newPwd = params.get("new_pwd");
        String oldPwd = params.get("old_pwd");
        String rePwd = params.get("re_pwd");
        if(!StringUtils.hasLength(oldPwd)||!StringUtils.hasLength(newPwd)||
        !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
//        原密码是否正确
//        调用userService根据用户名拿到原密码，再和old_pwd比对
        Map<String,String> map = ThreadLocalUtil.get();
        String username = map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }
//        newPwd和rePwd是否一样
        if(!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一样");
        }
//        2、调用service完成密码更新
        userService.updatePwd(newPwd);
//        删除redis中的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }
}
